Invasive species (plants and animals) are those that have been introduced from outside of their native range and have the potential to negatively impact humans, animals and/or ecosystems. Not all introduced species are considered invasive or harmful, though some can have a lag period before they become a threat.
Invasive species have the ability to establish quickly in new areas and spread rapidly. Invasive species are also known as alien, exotic weeds, introduced, and non-indigenous. Another term often used for invasive plants, noxious weeds, has traditionally included plants harmful to livestock (though currently expanded to include animals in general) or people. Noxious weed is also a term for legally designated species within provincial legislation (Weed Control Act).
- Lesser Celandine Alert Sheet [PDF - 1.2 MB]
- Giant Hogweed Alert Sheet [PDF - 256 KB]
- Garlic Mustard Alert Sheet [PDF - 1.9 MB]
- Poison Hemlock Alert Sheet [PDF - 188 KB]
- Policeman’s Helmet Alert Sheet [PDF - 185 KB]
- Shiny Geranium [PDF - 657 KB]
- Priority Invasive Plant Management Categories [PDF - 46 KB]
- Blessed Milk Thistle Alert Sheet [PDF - 250 KB]
- Yellow Flag Iris Alert Sheet [PDF - 137 KB]
- Invasive Knotweeds Alert Sheet [PDF - 1.7 MB]
- Purple Loosestrife Alert Sheet [PDF - 295 KB]
- European Fire Ants [PDF - 764 KB]
- Controlling Invasive Plants on Your Property [PDF - 6.1 MB]